The cross construction precautions involved in the installation and demolition of assembled steel composite support are as follows: 1. Earthwork excavation: (1) Earthwork excavation shall be carried out in accordance with the principle of "supporting before digging, layered symmetrical excavation, and overdigging is strictly prohibited". No earthwork excavation shall be carried out on the soil within the steel support area before the steel support is prestressed. (2) It is strictly prohibited to pile load on the steel structure support when digging. The steel structure support is the overall stress system, and the additional load on the support will lead to the instability of the steel support structure, which will affect the safety of the project.
Assembled steel bracePrecautions for cross-construction involving installation and demolition:
1, earth excavation:
(1)Earthwork excavation requirements are as followsThe principle of "support before digging, layered symmetrical excavation, no overdigging" is carried out. No earthwork excavation shall be carried out on the soil within the steel support area before the steel support is prestressed.
(2) It is forbidden to pile on the steel structure support when digging. The steel structure support is the overall stress system, and the additional load on the support will lead to the instability of the steel support structure, which will affect the safety of the project.
(3) No piling of earth is allowed near the steel support. Too much soil near the supporting structure will impact the supporting structure when the soil slides, which endangers the safety of the supporting structure.
(4) Stacking is strictly prohibited near the steel support column. Pile loading near the column will easily cause lateral displacement of the soil, which will lead to the deviation of the column position, and then lead to the horizontal movement of the brace and other structures, endangering the safety of the support structure.
(5) During earthwork excavation, steel support columns should be excavated symmetrically around them. Prevent the column from displacement or deformation due to excessive lateral earth pressure, affecting the safety of the supporting structure.
(6)In the process of earth excavation, construction machinery and other large equipment are strictly prohibited to cross the support structure after the support is covered with soil without any measures.
(7)In the process of digging, the on-site team shall be informed in writing and assigned personnel to be on duty to ensure that the equipment and materials will not touch the steel support.
2Steel support construction:
It is strictly forbidden for construction equipment inside and outside the pit to touch the steel support, and it is forbidden for non-workers to walk on the support without safety measures.
3, demolition and support construction:
When removing the support, coordinate with the tower crane on site and place the support on the bottom plate1A forklift equipment (approx5～6T) and need to coordinate the driving route in advance. Parking crane around foundation pit (25Tons of or50T), need to coordinate the working position in advance.
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